What this means
The IEEE assigned the MA-L block 005CC2 to SHENZHEN MERCURY COMMUNICATION TECHNOLOGIES CO.,LTD.. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 00:5C:C2, it is SHENZHEN MERCURY COMMUNICATION TECHNOLOGIES CO.,LTD. hardware.